Skip to content
Skip to content
TopHapOpen in map
Quadplex (4 Units, Any Combination)Residential
Last sold for $285,000 on Apr 23, 1993

320 4TH ST

PETALUMA, CA 94952
5
Beds
2.5
Baths
3,171 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.2 ac
Lot SizeThe size of the land the home sits on, from county records.
1878
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
7
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$285,000 · Apr 23, 1993

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$5,852 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$503,981 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$229,884
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$274,097
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$494,100

Climate Risk

Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.53
93
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
45
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
33
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
58
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
36
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.17 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.0.2 percent flood zone

Scores 0–100; higher = greater projected risk.

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Quadplex (4 Units, Any Combination)
CountySONOMA
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1915
Lot (acres)The size of the land the home sits on, from county records.0.20
ConstructionThe main material the home's frame and walls are built from.Wood (Unspecified)
HeatingThe type of heating system in the home.None
CoolingThe type of cooling or air conditioning in the home.None
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(6)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
McNear Elementary SchoolB+
Elementary · Grades KG–6 · 0.5 mi
H
Petaluma High SchoolB
High · Grades 9–12 · 0.6 mi
M
Petaluma Junior High SchoolB-
Middle · Grades 7–8 · 1.2 mi

District: Petaluma Joint Union High School District

Neighborhood · ZIP 94952These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.

CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.92
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.84
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.359

Index scale: 100 = US average (tick). Lower is better.

Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.93%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.5%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.2%
PopulationHow many people live in this area.35,634
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.160 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$113,828
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$154,802
Average tempThe average temperature here across a full year.57°F
Annual precipHow much rain and melted snow falls here in a typical year.39 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.78%

Owner Tools

Do you own this home?
Claim this home

Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

320 4th St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.

  • Bigger than 96% of homes in Sonoma County
  • Has a bigger lot than 90% of homes in Downtown Petaluma
  • Among the oldest homes in Sonoma County

How it measures up in Petaluma 94952

The dot is this home. The mark in the middle is the typical home in Petaluma 94952.

Living area3,171 ft²
SmallerTypical 1,695 ft²Bigger

Bigger than 93% of homes nearby

Lot size0.2 ac
SmallerTypical 0.18 acBigger

Bigger than 54% of homes nearby

Year built1878
OlderTypical 1964Newer

Older than almost all homes nearby

How 320 4th St ranks against every home in each area.
MeasureThis homeDowntown PetalumaPetaluma 94952Sonoma County
Living areabigger than3,171 ft²95% of homes93% of homes96% of homes
Lot sizebigger than0.2 ac90% of homes54% of homes61% of homes
Year builtnewer than18783% of homesalmost no homesalmost no homes

About 320 4th St

When did 320 4th St, Petaluma, CA last sell?

320 4th St, Petaluma, CA last sold on Apr 23, 1993 for $285,000, according to the county's recorded deed.

How big is 320 4th St, Petaluma, CA?

320 4th St, Petaluma, CA has 5 bedrooms, 2.5 bathrooms, 3,171 square feet of living space and a 0.20-acre lot.

When was 320 4th St, Petaluma, CA built?

320 4th St, Petaluma, CA was built in 1878, making it 148 years old. The building has 2 stories.

What schools serve 320 4th St, Petaluma, CA?

320 4th St, Petaluma, CA is assigned to McNear Elementary School (elementary), rated B+; Petaluma High School (high), rated B; Petaluma Junior High School (middle), rated B-. All sit in Petaluma Joint Union High School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 320 4th St, Petaluma, CA compare to other homes in Petaluma 94952?

Among the 10,074 homes in Petaluma 94952, it is bigger than 93% of them (3,171 ft² against a typical 1,695 ft²), its lot is bigger than 54% of them (0.2 ac against a typical 0.18 ac) and it is newer than almost none of them (1878 against a typical 1964). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 320 4th St, Petaluma, CA?

The 2025 property tax bill for 320 4th St, Petaluma, CA was $5,852. The county assessed it at $503,981.

More homes on 4th St

Closest homes

More homes in Petaluma 94952

Assigned schools

Explore the area

See this home in context

Open 320 4th St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map